/Engine/Plugins/Runtime/GameplayAbilities/Source/GameplayAbilities/Public/Abilities/Tasks/AbilityTask_WaitGameplayEffectStackChange.h
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)() void OnGameplayEffectStackChange ( [FActiveGameplayEffectHandle](API\Plugins\GameplayAbilities\FActiveGameplayEffectHandle) Handle, int32 NewCount, int32 OldCount )